Compiling with W=1 generates warnings:
CC kernel/bpf/core.o
kernel/bpf/core.c:721:12: warning: no previous prototype for
?bpf_jit_alloc_exec_limit? [-Wmissing-prototypes]
721 | u64 __weak bpf_jit_alloc_exec_limit(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~
kernel/bpf/core.c:757:14: warning: no previous prototype for
?bpf_jit_alloc_exec? [-Wmissing-prototypes]
757 | void *__weak bpf_jit_alloc_exec(unsigned long size)
| ^~~~~~~~~~~~~~~~~~
kernel/bpf/core.c:762:13: warning: no previous prototype for
?bpf_jit_free_exec? [-Wmissing-prototypes]
762 | void __weak bpf_jit_free_exec(void *addr)
| ^~~~~~~~~~~~~~~~~
All three are weak functions that archs can override, although none do so
currently. Provide prototypes for when a new arch provides its own.
Signed-off-by: Valdis Kletnieks <valdis.kletni...@vt.edu>
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 3851529062ec..99e55313123f 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -472,6 +472,10 @@ _out:
\
#define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
__BPF_PROG_RUN_ARRAY(array, ctx, func, true)
+u64 __weak bpf_jit_alloc_exec_limit(void);
+void *__weak bpf_jit_alloc_exec(unsigned long size);
+void __weak bpf_jit_free_exec(void *addr);
+
#ifdef CONFIG_BPF_SYSCALL
DECLARE_PER_CPU(int, bpf_prog_active);
